Abstract
IODINE in seawater is present as iodate (IO3−) and as iodide (I−)1–3. Although there is some uncertainty in the true redox potentials of natural waters4, the thermodynamically stable species of iodine in seawater, and in river waters which are well oxygenated, is iodate5–7. We have studied an estuary to determine the distribution of iodine species as a function of salinity, and examined the results for evidence of interconversion of species in the estuary. We report here that iodide is the dominant form in river water and is oxidised to the thermodynamically stable iodate in the sea, not in the estuary.
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SMITH, J., BUTLER, E. Speciation of dissolved iodine in estuarine waters. Nature 277, 468–469 (1979). https://doi.org/10.1038/277468a0
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DOI: https://doi.org/10.1038/277468a0
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